furman



S. FURMAN,

MACHINE FOR MAKiNG WINDOW EN'VELOPS.

APPLICATION FILED AUG,24 1917.

Patented June 7 1921.

5 SHEE SHEET 1.

In vcni'oi Eamuel Fun-man. By PM 9% fzffovneyfl S. FURMAN.

MACHINE FOR MAKING WINDOWIENVELOPS.

APPLICATION HLED AUG24, i917.

Patented June 7, 1921.

5 SHEETS-SHEET 2.

MON

Invcn fov Samuel Fuvman.

flfi ys S.-FURMAN.

MACHINE FOR MAKING WINDOW ENVELOPS.

APPLICAHON HLED AUG124, I917.

Patent ecl June 7, 1921.

5 SHEETS-SHEET 3.

S. FURMAN.

MACHINE FOR MAKING wmnow ENVELOPVS.

- Patanted June 751921;

' swans-sums.

memo FILED man. 1911. 1,381,090,.

Inveni'ov Samuel Fun-man UNITED STATES PATENT OFFICE.

SAMUEL FURMAN, or WORCESTER,MASSACHUSETTS, ASSIGNOR To UNITED STATESENVELOPE COMPANY, or srninerrnnn, MASSACHUSETTS, A CORPORATION OF MAINE.

Continuation of application Serial No.

To all whom it may concern: I Be it known that I, SAMUEL FURMAN, acitizen of he United States, residing at lVorcester, in the county of\Vorcester and Commonwealth of Massachusetts, have invented a new anduseful Improvement in Machines for Making Window-Envelope, of which thefollowing, together with the accompanying drawings, is a specification.

The present invention relates to improvements in a machine for makingwindow envelops, this application being a continuation of my copendingapplication Serial No. 15,506, filed August 14, 1915. The machine of thepresent invention contemplates the provision of mechanism for feedinginitially cut window envelop blanks into and through the machine,suitable inst-rumentalities being provided for first cutting a windowopening in the blank, then gumming around the margin of said windowopening and along that edge of the blank which constitutes the back flapof the envelop. Thereafter, the machlne applies a patch or panel oftransparent material to the gummed window opening to cover the same,after which the end flaps of the blank are folded inwardly, and the backflap, already gummed, is folded down over said end flaps to com-. plotsthe pocket or inclosure. In its further progress through the machine theextended seal flap of the envelop thus partly formed, is gummed alongits free edge, and thereafter said seal flap is creased or turned overtoward the back of the envelop, but is prevented from making contacttherewith.

The invention resides in the provision of a novel combination ofinstrumentalities for accomplishing the foregoing objects, as well asadditional mechanism for automatically rendering inoperative the sealflap gumming mechanism when no blank is forwarded thereto. The novelfeatures of my invention are fully set forth in the followingdescription and in the annexed claims, reference being had to the,accompanying drawings, in which Figure 1 is a side elevation of theachinc embodying my inventions. V

Fig. 2 is a top plan view of the same, with parts removed.

Fig. 8 is a longitudinal sectional 'iew of the machine.

Fig. 1 is an end view looking from the right in Figs. 1, 2 and 3, andomitting, for

MACHINE FOR MAKING WINDOW-ENVELOPS.

Specification of Letters Patent. Patent d J n 7 19 45,506, filed August14, 1915. This application filed August 24, 1917.' Serial No. 187,980.

the sake of clearness, the seal flap gumming mechanism.

Fig. 0 1s a detail View of the mechanism for rendering lnoperatlve theseal flap gumming mechanlsm; 1 7

Fig. 6 1s a cross sectional View of a portion of the folding mechanism.

r F g. 7 1s a fragmentary planview of the folding; mechanism.

big. 8 is a sect onal View on the line 88, of Fl'g. 7,

F g. 915 a fragmentary sectional view on the line 9=-9, of Fig. '7.

Fig. 10 1s a detail view of the seal flap gumming mechanism.

Sim lar reference characters refer to like parts in the difierentfigures.

Referring particularly to Figs. 1, 2 and 3,=

the mechanisms constituting my invention are carried by frames 1, 1, andauxiliary superposed frames 2, 2. A main driving shaft 3 is journaled inthese frames, and carries a driving pulley or other actuating means,shown'at 3, for transmitting power to the sei 'eral'mechanisms. g

The envelop blanks are fed forward in the machine by means of an initialfeeding mechanism which advances them successively to the point in themachine Where they are punctured to form awinolow opening; This initialfeeding mechanism may be of anv well known construction, and in thepresent instance Lhave shown the same as consisting of a plurality offeeding disks 4, 4:, carried on shaft5, said disks cooperating withdisks 6,- 6, on a. shaft 7. The shafts 5 and 7 are geared together to.rotate in unison, and are driven by suitable gearing, not shown, fromthe maindriving shaft 3.

In advance. of the feeding disks 1 and 6 aredisposed upper and lowerfeed rolls 8 and 9 which are carried on shafts 10 and 11 respectively,and which feed the blank, as shown by the broken lines 12,,Fig. 2, ontoskeleton support 13. Below said support, and near the outer edges of theblank, as shown inFig. 2, are provided a pair of laterally spaced, disks14, 1 1, carried on a shaft 15. Said disks 1% each have a segmentalportion 16 of the periphery cut away, as shown in Figs. 1 and 3, and theshaft 15 is so timed with respect to the advance of the blank thatthesecut away por ions 1.6 are brought uppermost beneath the blank, as thelatter arrives on the support 13. For cooperation with the disks 14 Iprovide a corresponding pair of suitably journaled rolls 17, which aredesigned to make rolling contact with the unrecessed peripheries ofdisks 1 1, but which are inoperative when the cut away portions 16thereof pass beneath the blank. As a consequence each blank upon itsarrival on the support 13, has its forward motion arrested during thepassage therebeneath of the cut away portions 16 of the disks 14; afterthis momentary stoppage, due to the stops 32, hereinafter described, theadvance of the blank is continued by the cooperation of disks 1% withrolls 1?. The shaft 15 is continuously rotated by suitable gearing, Fig.2, from the main driving shaft 3.

During the stoppage of the blank on support 13, a. window is cuttherein, as shown in Fig. 2. To this end, the shaft 15 is inclosedloosely within an elongated slot 18 in a sliding block 19, the lower endof which is guided ina bracket 20 of frame 1. The block 19 may befurther guided by means of adjustably mounted rollers 21, which bearagainst opposite sides of an extension 22 of said block, in order toinsure the parallel reciprocation of the same. The block 19 isreciprocated by means of a pair of cams 23 and 2% on shaft 15, one cam23 cooperating with a roller 25 to lower the block, and the other cam 2dcoiiperating with roller 26 to raise the block.

The block 19 carries on its upper end a male die or punch 27. Forcooperation with the male die 27, the machine provides a female die 28,disposed above the blank in a stationary support 29, the latter beingopen asat 30, for the passage of the waste paper resulting from thepunching operation of the die 2'7, at each reciprocation of block 19.Thus each blank brought to rest oh the support 13 has a window openingout therein, as shown by the full line 31, Fig. 2.

In order to register each blank in exact position for the cutting ofthis window opening, 1 preferably provide a pair of oscillating stops 32which may conveniently take the form of inwardly and downwardly bentbars or wires 33, adjustably secured in sockets 34 on a rock shaft 35;the latter is oscillated by means of a rock arm 36, pivotally connectedto a forked link 3?, the other end of which embraces and is guided bythe shaft 15. Said link 37 carries a roller 38 for cooperation with acam 39 on shaft 15. As the blank is moved onto the support 13 by thefeed rolls 8 and 9, the stops 32 are depressed so as to lie in the pathof its advancing edge, being arranged for reception in the reentrantangles which define the line of fold of the back flap. as shown in Fig.2. After the window opening is cut, as above described, and just beforethe disks ll and rollers 1'? become effective in continuing the forwardmovement of the blank, the stops 32 are raised out of the path of theblank by the oscillation of rock shaft 35, under the influence of cam39.

The disks l4 and roller 17 then advance the blank into the bight ofcooperating pairs of feed disks 1-0 and'el which are suitably driven bygearing, Fig. 2, from the main driving shaft 3. In advance of said feedroller the machine provides a cylinder 42, which is mounted on arotating shaft 413 below the blank, and driven by suitable gear ing fromthe main shaft This cylinder 1-2 cooperates with a p: 'r of upper feeddisks 4% for continuing the forward movement of the blank, said disksbeing soaced apart laterally in substantial alinement with the disks 11so as to make contact with the blank beyond the limits of the back flapand beyond the limits of the window opening. The disks n are mounted ona shaft 45 which is geared to rotate in unison with, and at the samespeed as the shaft 13.

Said shaft do has secured thereto a gumming segment $16 which carries anangular gumming die -17 co responding in contour to the edge of the backflap and an annular gumming die 1E8 corresponding in contour to themargin of the window opening in the blank. A gumtransferring roller +19of usual construction is disposed in the path of the gu-mniing dies 4:7and 13, and is adapted to apply, at each revolution of shaft coating ofgum thereto. The roller as is in continuous contact with a gummingcylinder 50 which rotates partially submerged in a gum box 51 carrying asupply of liquid adhesive. In this way the edge of the back flap, andthe margin of the window opening in each blank are supplied with moistadhesive during the passage of the blank through the machine, withoutarresting ll'S forward movement. The cylinder 42 cffectually supportsthe blank during this gumining operation.

The advance of the gummed and cut blank is continued by the cylinder andcoopcrating disks er, and also by pairs of feed rollers 52, which aresuit-ably spaced apart laterally so as not to make contact with thegummed portions of the blanks surface. These rollers as well as therollers 10 and 41 are supplemented, if necessary, by suitable guidingdevices 53 and 54;, on oppoposite sides of the blank, which prevent sagging or deflection of the extended surfaces or flaps thereof, in themanner common in machines of this class. The rollers 52 project eachblank successively onto a stationary tabl or support with. the advancingend of back flap of the blank overlying a plate or member 57, as shownin Fig. 2. Each blank is brought to rest on said table by means of anair of stops 56 which are laterally spaced apart to correspond tothereentrant angles of the advancing edge wnich angles define the lineof fold of the back flap. These stops 56 project r'earwardly from themember 57 which is carried by a rock shaft 58. The rock shaft 58-isactuated through a rock arm 59, which is pivotally connectedto a forkedlink 60, the other end of which embraces and is guided by a continuouslyrotating shaft 61, hereinafter more particularly referred to. This shaft(Bl, which is driven by suitable gearing from the main driving shaft 3,carries a cam 62 which operates against a roller 63 on the forked link60, to rock the shaft 58 at appropriate intervals. The above describedmechanism is timed so as to interpose the stops in the path of theblank, just as the latter arrives on the table 55, thereby effectuallyregistering said blank in proper position for. the application of apatchthereto, and for the operations of folding the side and back flapsthereof, as hereinafter de scribed.

For the purpose of exact registration, to prevent the rebound of theblank aft-er impact with the stops 56, I provlde a pair of spaced arms 61, 64, journaled on a rock shaft 65, and constrained to move with saidshaft by means of attached springs 6-1, 64, Fig. 5. he arms 64 arenormally in the position shown in Fig. 6, until a blank has passed ontotable 55. As soon as a blank arrives on sa l table, and strikes againstthe stops 56, the shaft 65 is rocked, to carry the arms or from theposition shown in Fig. 6 to the position shown in Fig. 3, where, theupper ends of said arms enter slots 55, and are brought to rest by theiradjustable stops 65, approximately within the recntrant angles on therear edge of. the blank, which angles define the line of fold of theseal flap.

The rotation of shaft 65 continues, for a pur# pose hereinafterdescribed, the springs 64 permitting this movement-{and pins 64: on saidshaft serving to return the arms, on the reverse oscillation of theshaft. The shaft (35 has secured thereto a rocking arm 66 which ispivotally connected to a forked link 67. The free end of the latterembraces and is guided by a shaft 68 which is rotated continuouslythrough suitably timed gearing, Fig. 2, from the main driving shaft 3,said shaft 68 having a cam 69 thereon which cooperates with a roller 70on link 67 to impart suitably timed oscillations to the shaft 65. Inthis way the blank is registered and squared by the conjoint operationsof stops 56 and arms 64 in position for the application of a transparentpatch thereto. The patch material is fed from a suitable supply roll 71which is carried on a spindle 7 2. The material is advanced between feedrolls 73 and 7 l, which operate intermittently, in condevices 47 and asheretofore referredto.

junctionwith cutting devices 75 and 7 6 to produce patches ofpredetermined length, for application to successive blanks;

The mechanism herein shown for intermittently feeding the patch materialand for cutting the same between the stationary member 75 and thereciprocating member 76, is substantially the same as the correspondingmechanism shown in my United States LettersPatent No. 1,182,364, grantedMay 9, 1916;, said mechanism by itself forms no part of the presentinvention, and-therefore a detail description thereof is unnecessary. Itis to be understood thatany suitable patch cutting and feeding devicesbe employed in thisconnection.

The patches thus fed forward and cut off are deposited on a pair of arms77, projecting from a rock shaft 78. Said rock shaft has an operatingrock arm 79, which is pivotally connected to a forked link 80, thelatter at its free end embracing and being guided] by the shaft 4-5which carries the gumming Said shaft l5-carries a cam 81 whichcooperates with a roller 82 on link 80 to impart the desiredoscillations to rock shaft 78, whereby thearms 77 are held in horizontalposition, to receive a transparent patch from the patch feeding andcutting devices, and to hold said patch in the path of a verticallyreciprocating member 83. The movable member 76 of the patch cuttingmechanism above described is operable by a link Set and arm 85, saidlink being pivotally attached to a lever 86, pivotedat 87, and having acam roller 88' for cooperation with a cam 89 as shown in Fig. 1;

The member 83 is reciprocated in a fixed guide 90 by means of a swinginglever 91 which is pivoted at 92 in the frame-work 2 on shaft 68,

and'has link connection 93 with said mem-' her. A forked arm 94 ispivotally connected to the swinging lever 91, and its other end embracesand is guided by the shaft 68, said arm carrying a cam roll 95 whichcooperates with a cam 96 on said shaft (38. Themember 83 is hollow, andprovides on its lower operating face 97, Figs. 1 and 4t, a

plurality of apertures 98, conmiunicating with its interior. Theinteriorof said me1nber 83 is connected by a flexible connection 99 witha suitable exhaust apparatus, not shown, by means of which a partialvacuum -may be created at will through said member.

face 97 of member 83 The patch is thus transferred from the arms 77, onwhich it has rested by gravity,'to'the under face of the member 83,against which is held by suction, and the further descent of said membercarries said patch downward into contact and registration with thewindow opening of the envelop blank which has come to rest on the table55.

As the member 83 carries the patch into contact with the gummed marginof the window opening in the blank, the suction through said member andits flexible connection 99 may be released, and if desired, a pressureof air in the opposite direction through said member may be created bythe pump or other exhaust apparatus, above referred to, but not shown.At the same time, coincident with the approach of the patch into contactwith the blank, the removal of said patch from the reciprocating member83 is insured by the stripping action of a creasing and forming p etc100 which is carried on arms 101 attached to a reel: shaft 102. The rockshaft 102 has an operating arm 103 which pivotally connected by means ofa link 10-1 to a lever 105. pivoted at 106 to the framework 1. A camroll 10? on lever 105 is acted upon by a cam 108 on shaft 3 to rock theshaft 102 at appropriate intervas, whereby the plate 100 is moved fromthe position shownin 6, to the position shown in 1 and 3, substantiallycoincident with the approach of a patch toward the window open ing of ablank on the table 55.

The plate 100 is skeleton in formation required that said plate shallexert a suffe.

cient pressure to firmly apply the patch to the blank, since thispressing function is taken care of by other parts, as hereinafterdescribed. .211; the same time, the arrangement of parts may, ifdesired, be such that the free edge of said plate 100 cooperates withthe adjacent free edge of member 57, to impart an initial crease alongthe line of fold between the bacl: flap of the body portion of theblank. That is, soon after the plate 100 is lowered, the member 57, overwhich the back flap extends, is raised, and thereby partially turns upsaid back flap. This action between the adjacent edges of the plate 100and member 57 accomplishes an initial creasing of the blank along theline of fold between the back flap and the body portion of the blank,but it is to be understood that such action is not essential to theoperation of my machine, since means are provided as hereinafterdescribed, for completely creasing and folding said back fiap at asingle operation.

The plate 100 may also be designed to impart an initial crease along theline of fold between the seal flap and the body of the blank. To thisend the rearward portion of table 55 has a movable section 110, the samebeing vertically slidable between integral depending walls 111 and 112of said table. ihe movable section 110 has depending therefrom at eachend a yoke 113, which embraces and is guided by the rock shaft 65. Thelatter carries cams 11%, which, after the arms 6% have been moved intooperative position as above described, act on rollers 115 of said yokesto raise and lower the movable section 110 toward and away from theplate 100. Said plate 100 hasa projecting transverse spur or edge 116which coincides with the line of fold of the seal flap when said plate100 is in its horizontal position. A corresponding transverse notch 117in the movable section 110 cooperates with the spur 116 to impart aninitial crease or score along said line of fold of the seal flap whensaid movable section 18 raised by cams 114 as above described.

This initial creasing of the seal flap takes p ace substantiallycoincident with the folding in of the side flaps of the blank, after epatch has been applied to the gummed in the member 57 and stops 56 havebeen rocked upwardly into the position shown in Fig. The plate 100, inits horizontal position tends to press the body portion of the blankdown-into contact with the table 55, and the side edges of said plate,which correspond to the lines of fold of the side flaps, act as formersover which said side flaps are folded, as hereinafter described. In thisforming position of the plate 100 the side flaps of the blank aredeflected slightly upward, because of the interposed thickness ofadjacent side fiap folding plates 118 118, Figs. 7 and 8, which areslidable in and out on the surface of table 55, and normally lie beyondthe lateral edges of plate 100. In the section shown in Figs. 7 and 8,the blank is designated at 119, the rectangular body portion of the samebeing shown as pressed down firmly upon table 55 by the platelOO, whilethe side flaps thereof project outwardly over the plates 118.

The plates 118 have depending extensions 120 which project throughtransversely elongated slots 121 in table 55. Each extension 120 has avertically elongated slot 122 to receive the trunnion 123 of a pair ofrolls argin of the window opening, and after nion 123 is pressed towardthe top of slot 122 by a compression spring 125 which permits relativemovement between the rolls 124 and their plate 118, and thus allows saidplate su'liicient play to pass over the adjacent of plate 100, in theact of folding in the side flap of the blanln To this end the side edgesof the plate 100 may with advantage be beveled off, as shown at 126,Fig. 8, and the adjacent edges of plates 118 may be undercut, as shownat 127. The plates 118 are moved in and out, to accomplish this foloingaction by means of levers 128, 128, which have pin and slot connecetions 129, 129, with the lower ends of extensions 126. Said levers 128extend rearwardly of the machine and are pivoted at 1.30, 130, to theframework 2 on opposite sides thereof, the rear ends of said leverscarrying rolls 131, 131, which are acted upon by face cams 132, 132, onshaft 43, hereinbefore referred to. In this fashion the plates 118 aresimultaneously moved inwardly toward each other tofold the side flaps ofsuccessive blanks over the adjacent edges of forming plate 100, and arethen withdrawn to permit the action of the back fiap folding mechanism.

The back flap folding mechanism is incorporated with a rotary carryingmechanism which, simultaneously with the folding of the back flap overthe inturned side flaps, removes the partially completed envelop fromthe table and advances it to the mechanisms for gumming and folding theseal flap, as hereinafter described. To

this end the shaft 68 has secured thereto a carrying cylinder 133 withwhose periphery the table 55 is substantially tangential, at the forwardedge of said table, directly above the shaft 68, as shown in Figs; 3 and6. The surface of said cylinder 133 provides a longitudinal opening 134for the operation of a gripper folder 135 which is .secured to anoscillating shaft 136 carried by the cylinder 133 in a positioneccentric to its axis. The ends of shaft 136 pass through and arejournaled in the heads of the. drum or cylinder 133, one end of saidshaft carrying an arm 13? which provides a roller 138 that is acted uponat a proper period of its rotation about the axis of shaft68 by adefleeting cam surface 139, thereby rocking the 137 to quickly rock saidshaft 136 in a counterclockwise direction, Figs. 3 and 6. In order toaccelerate this rocking movement the deflectingcam surface 139 issecured on a rocking member 140 which, c0- incident with the arrival ofroller 138 in contact with surface 139, is moved quickly in the oppositedirection to said roller by means of a cam 141 on a shaft 142 which isdriven through suitable gearing, Fig. 2, from the main driving shaft 3.'The cam 141 acts against a roller 143 which is carried by a forked link144 that embraces and is guided by the shaft 142, the other end of-saidlink being pivotally connected at 145 to the rocking member 140. v I

This extremely rapid oscillation of the shaft 136 occursas the cylinder.133 ap proaches th position illustrated in Fig. 3, with the resultthatthe gripper folder 135 is moved quickly through the opening 134 intothe position indicated in said figure.

Said gripper folder provides an angular extension 146 which strikes theunder side of the back flap, as. it approaches thefposition ofFig. 3,and thereby folds said back flap over the adjacent edge of forming plate100, at the same time pressing the inner or lower part of the gummededge of said back flap firmly into contact wlth the in turned side flapsof the blank. The line of fold of the back flap is pinched and seized bythe inner and under portion of angular extension 146, particularly byyielding friction devices l46,such as rubber cushions, acting throughopenings 109, in conjunction with the peripheral surface of cylinder133, with the result that the partially folded envelop is drawn off ofplate 100 by'the continued clockwise rotation of said cyl inder, thegripper folder 135 becoming increasingly. effective in pressing down theback flap as said rotation is continued. Finally, the roller 138 reachesthe end of deflecting cam surface 139, whereupon the gripper folderreleases "the envelop and springs back to its normal position, shown inFig. 6, under the influenceof aspring 147, which is secured at one endto the shaft 136 and at the other end toan arm 148, through which said,shaft loosely passes and which is journaled on shaft 68. c

i The partly foldedv envelop thus carried downwardly by the rotation ofcylinder 133 is acted upon by a pressing plate 149 of cylindricalcontour, which is secured" to a cylinder 150, carried by the shaft 61herein- ,before referred to. The cylinder 150 is of such a diameter asto have its. periphery spaced from the periphery, of cylinder 133 toallow the passageof the gripper folder 135 on thelatter cylinder, butthe pressing plate '149 rolls in substantial contact with the cylinder133, and thereby firmly unites the folded back flap to the in--turnedside or end flaps, thus completing the rear wall of the envelop,and at the same time firmly unitin the transparent patch to the frontwall. aid pressing plate 149 is preferably of such a shape that whendeveloped in a single plane it corresponds approximately to the edge ofthe backflap of the blank, andsaidfplate is so propertioned that itspressure on the back flap cease-S j Sher; of heedge t reef in rder notto cause the moist gum to exude past said edge.

The cylinder 150 provides an opening 151 in its periphery toward whichproject a pair of spaced radial arms 152 secured to the shaft 61. Thesearms 152 are slotted at their outer ends to receive the stem 153 of aseal flap gumming member 154, said stem being radially movable in saidslots. To this purpose saidgumming memberhas rollers 155 mounted ontrunnions 156 at each end, said rollers being pressed inwardly bysprings 156', Fig. 2, into contact with the peripheries of a pair ofsimilar cams 157, which are loosely journaled on the shaft 61, as shownin Fig. 10.

In the normal operation of the machine, the gumming member 154, asrotated by the shaft 61, receives a coating of gum from a transferroller 158, the latter being continuously supplied from a gumming roller159 submerged in a gum box 160 of usual construction. In normal positionshown in Fig. 10, the contour of cams 157 is such that the gummingmember 154 after being extended to make contact with transfer roller158, as shown, then is crawn inward to lie approximately even and flushwith pressing plate 149, and in this position said gumming member lays acoating of gum along the edge of the seal flap of an envelop in transitbetween cylinders 133 and 150. In this manner the seal flap of eachpartly finished envelop is gummed, immediately after the pressing actionof the plate 149, and thereupon each envelop, being released by thegripper folder 135, passes by gravity, or otherwise, into the bight offeed rollers 161 which advance it to the seal flap folding mechanism, ashereinafter set forth.

It sometimes occurs, however, that, due to a momentary cessation infeeding the blanks, or to any other cause, there is no partly formedenvelop passing between the cylinders 133 and 150 when the gummingmember 154 reaches its operative position, as above described. Underthese circumstances the normal operation of said gumming member wouldcarry it into contact with the surface of cylinder 133, with the resultthat the succeeding envelops passing through the machine would be soiledand would adhere to the surface of said cylinder, necessitating thestoppage and cleaning of the machine. To avoid this result, the cams 157are pivotally connected as at 162 to a link 163 which is'operated by anarm 164; extending from a rock shaft 165. Said rock shaft is adapted tobe actuated by an arm 166, on the end of which is secured a laterallyprojecting stud 167, Fig. 5, having loosely mountedthereon for slidingmovement a wheel 168. Said wheel is yieldingly pressed against a stop169 at the outer end of said stud by means of a compression spring 170,

and in this position said wheel is out of the pat-h of a cam 171, whichis secured on a shaft 1 2 that IS continuously driven by suitablegearing, Fig. 2, from the main drivpins or fingers 173, when the movablesection 110- is moved upwardly by the action of oscillating cam 114.IThese fingers 173 are carried by a block 174, which is supported on theend of a lever 175, pivoted at 176 to a bracket 177 depending from thetable 55. The other end of lever 175 is pivotally connected at 178 to apitman 179 which has a beveled lower end 180 in close proximity to thebeveled edge of wheel 168.

The pitman 179 is suitably guided for parallel reciprocation by a pinand slot connection with a bracket 181, and is urged down wardly, Fig.5, by a spring 182 of greater strength than the spring 170 which holdsthe wheel 168 away from cam 171. However, the spring 182 is notsuiiiciently strong to depress the pit-man when there is a blank on thetable 55, since the upper ends of pins 173 will be obstructed by thepresence of a blank, and hence the pitman will remain in the positionshown in Fig. 5. 0n the other cam 171 is brought into play to rock theshaft 165, and thereby through the arm 164 and link 163 to rotate thecams 157 so that the gumming member 151 controlled by said cams will bedrawn inwardly when opposite the cylinder 133, by low portions 157 ofthe cams, and will have its subsequent out ward movement advanced to apoint in its travel where it is not directly opposite the cylinder 158.In this manner, the smearing of gum on the cylinder 133 is effectuallyprevented.

The feed rollers 161 are suitably groovel and arranged to avoid contactwith the moist gum on the seal flap as the nearly completed envelopspass therebetween and fall by gravity into a V-shaped receptacleconstituted by a stationary wall 183 and a swinging wall 18%, which iscarried on a rock shaft 100, supported by the framework, The envelopsdrop into this ii-shaped receptacle, with their folded lower endsforemost, and with their gummed seal flaps proj ecting past the upperedgeof wall 184. As each envelop is thus received, the wall 1841 isrocked inwardly from the position shown in Fig. 1 to the position shownin Fig. 3, by means of an arm 186 connected to rock shaft 185 andoperated by a forked link 187 which emb aces and is guided by the shaft172. Said shaft 172 carries a cam 188 which acts on a roller 189 of thelink 187 to rock the shaft 185, and thus brings the extended seal flapof the envelop adjacent to the periphery of a cylinder 190 carried bythe shaft 172.

T he cylinder 190 constitutes a convey ing mechanism for delivering theenvelop from the V-shaped receptacle above described to a drying chain191 of usual construction, or to any other mechanism of this class forhandling the completed'envelops, and said cylinder 190 combines with itscon veying function, the function of finally turning over or folding thegunimed seal flap of the envelop, which preferably has had an initialcrease along its line of fold while resting on table 55. To this end thecylinder 190 has a longitudinal op'ening192, for the operationtherethrough of a gripper folder 193, carried on an oscillating shaft194 which is supported at its ends by the cylinder 190 in an eccentricposition to the shaft 172, and operated in precisely the same manner asthe shaft-136 of gripper folder 135. That is to say, the shaft 19 1 hasan arm 195, F ig. 3, which carries a roller 196 that bears on adeflecting cam surface 197,

similar to the deflecting cam surface 139' above referred to. Saiddefiecting cam surface 197 is oscillated in the direction opposite tothe rotation of cylinder 190 by means of a forked link 198, Figs. 1 and4:, which embraces and is guided by the shaft 142, the latter having acam 199 which cooperates with a roller 200 on link 198 to impart theproper movement to deflecting cam surface 197 i In this way therequisite quick action of gripper folder 193 is obtained, similar to theaction ofgripper folder 135, whereby the extended seal flap of anenvelop, held against the periphery of cylinder 190 by the swinging wall184:, is struck backward by the gripper folder 193, and folded over theedge of said wall 184, during the rotation of cylinder 190. The gripperfolder 193 is shaped so as to pinch and seize the envelop only along theline of fold of the seal flap, without pressing the same into contactwith the back wall of the envelop and the envelop so pinched and seizedis carried around by the rotation of the cylinder 190 until the gripperfolder releases: the same and swingsback into normal position under theinfluence of a spring 201, Fig. 4-,- This carries the envelop betweenthe cylinder 190 and a pair'of cooperatingfeed rolls or cylinders 202which are carried on ashaft 203 that is rotated continuously by suitablegearing from the main driving shaft 3. The cylinder 202 is cut away, asshown at 204, so as to avoid pressing the seal flapinto contact with theback wall of the envelop. The cylinders 190 and 202 cooperate inforwarding the completedei'ivelops to the drying chain 191, or otherequivalent device, where the seal flap gum is thoroughly dried beforethe envelops are stacked and boxed. The operation of my improved machinewill be clear from the detailed de cription of its component parts andfunctions. It will be clearly understood that in the severalinsti'unientalitieswhich depend upon cams a d cam rollers for theiraction, the cam rollers are held against the cams by springs, or otherequivalent devices, which are not herein shown in detail, in order notto'coinplicate unnecessarily the drawings; ft-will also be understoodthat my invention is not confined in any way to the specific mechanismemployed for accomplishing; the various functionsof the machine, but isentitled to a fair range of equivalents within the terms of the annexedclaims.

' More specifically referring tothe operation of the folding devicesabove described, it is to be understood that the forming plate 100 doesnot firmly grip or bite the blank when in its horizontal position so as110 of table 55 has started to 'move down,

so that there is no pinching or gripping; of the envelop between saidmovable s "ion and the plate 100. in this way the r tion of the gripperfolder 135 is greatly facilitated i being c ear tl at the resilientcushions 14-16, acting through the open ngs 109 in the edge of slate100, can firmly seize and press the folded edge of the partly formedenvelop into "ripping contact with the perig'iheryof ca nqcylinder 133.

I claim,

1. A machine forinakins window cnveh patch of transparent paper to said,blank on said support, a stripping: plate adapted to strip said patchfrom said suction member and to deposit said patch on said bl? v pa r offolding'plates adapted find, the

side flaps of the blank over said stripping plate, and means foractuating said suction member, said stripping plate and said foldingplates. 7

2. A machine for making envelops, comprising a support for the body ofan envelop blank, said support having an opening therein, a lowercreasing plate adapted to pass through said opening under part of saidblank, an upper creasing plate adapted to clamp the body of said blankon said support, a projection carried by one of said creasing plates,and a notch in the other creasing plate, whereby the cooperation of saidplates effects the creasing of the seal flap of the blank, a pair offolding plates adapted to fold the side flaps of the blank over saidupper creasing plate, and means for operating said creasing plates andsaid folding plates.

3. A machine for making envelops, comprising a support for the body ofan envelop blank, a movable plate in advance of said support and adaptedto receive on its upper surface the back flap of the blank, an uppercreasing plate adapted to clamp the body of the blank on said support, alower creasing plate adapted to pass through an opening in said supportunder part of said blank, the cooperating edges of said movable plateand said upper creasing plate being adapted to crease the said back flaptherebetween, and the cooperating faces of said upper and lower creasingplates being adapted to crease the seal flap of the blank therebetween,a pair of suitable folding plates adapted to fold the side flaps of theblank over said upper creasing plate, and means for actuating saidcreasing plates and said folding plates.

4. In a machine for making envelops, a support for an envelop blank, aplate in advance of said support and adapted to receive on its uppersurface he back flap of the blank, an upper creasing plate adapted toact as a clamp for the blank on said support, the cooperating edges ofsaid plates being adapted to crease the back flap therebetween, and amechanism for folding said back flap adapted to cooperate with saidsupport to engage a blank thereon and fold the same, and means formoving said first mentioned plate out of the path of said back flapfolding mechanism during the operation of folding said back flap.

5. In a machine for making window envelops, means for feeding envelopblanks through the machine. a support for said blanks, a patch applyingmechanism adapted to apply patches of transparent paper to successiveblanks on said support. means for registering said blanks with saidpatch applying mechanism, said registering means including a pair offrontal stops adapted to arrest the forward motion of said blanks,

and means for creasing the back flaps of the blanks, said creasing meansincluding a movable plate in advance of said Support and said frontalstops being mounted on said creasing plate.

6. In a machine for making envelops, a support for envelop blanks, anoscillating plate in advance of said support and adapted to receive onits upper surface the back flaps of said blank, an upper creasing platecooperating with said support and adapted to clamp said blanks thereon,the cooperating edges of said plates being adapted to crease the saidback flaps therebetween, preliminary to their being folded, and amechanism for folding said back flaps adapted to cooperate with saidsupport to engage a blank thereon and fold the same, said oscillatingplate being movcble out of the path of said back flap folding mechanismduring the operation of folding said back flaps.

7. In a machine for making envelops, a

mechanism for folding the back flaps of the envelop blanks, comprising asupport for said blanks, a suitable clamp adapted to hold said blanks onsaid support, a rotary carrier, a gripper folder mounted on said rotarycarrier, said gripper folder being adapted to seize and fold said backflaps over said clamp on said support, thereby also closing the same,and to remove the folded blanks from said clamp and off said support,and means for actuating said clamp and said gripper folder.

8. In a machine for making window envelops, means for conveying atransparent patch to an envelop blank, to cover a win dow openingtherein, an oscillating member for stripping said patch from saidconveying means, and folding devices, cooperating with said oscillatingmember, for folding the flaps of the blank.

9. In a machine for making envelops, a Support for an envelop blank, amovable plate in advance of said support, over which the back flap ofthe blank projects, a member movable into contact with the upper surfaceof the blank on said support, and cooperating with said support tocrease the seal flap of said blank, and with said movable plate tocrease the back flap of said blank.

10. In a machine formaking envelops, a support for an envelop blank, amovable plate in advance of said support, over which the back flap ofthe blank projects, a member movable into contact with the upper surfaceof the blank-on said support, and cooperating with said supportto creasethe seal flap of said blank, and with said movable plate to crease theback flap of said blank, and means cooperating with said member forholding the side flaps of said blank.

11..In amachine for making'envelops,

rneans for stationarily supporting an envvelop blank, with ia-flapthereof overhang- 1 ing" said supporting means, a rotating cartherotation thereof, forfolding back said movable into contactwith theupper surface flap, and for cooperation with said carrier" to seize theedge of'the blank'thus folded, v I v I n p v ,into'contactiwithsaiddisengagement cam in and to remove said blank from said support. 12.'In, va machine for making envelops;

means for .stationarily' supporting an envelopblank, with a flap thereofoverhanging said supporting. means, a rotating carrier ad acent saidoverhanging flap,v a member:

of a blank on said support, and oscillating means 'on said carrier,operablelduring the rotationthereOf, for cooperation with said member tofold said overhangingflap. a 13. In a machine for making envelops,

,means for stationarily supporting an en vvelop blank, with-a flapthereo'foverhanging said supporting means, a rotating vcarrierZLClJiLCGIlt-I said overhanging. 'flap, a member s-movable into contactwithth e upper surface of a blank 0nsaid support, and oscillating meanson said carrier, operable during the: rotation thereof, for: cooperationwith said member to foldsaid overhanging flap, and, for cooperationwith, said carrier,.to seize h the edge of the blankthus foldedand tore;- 7

move said blank from'said support;

14. I11 a machine for making window en-I I u e I iimechamsmfor"'foldingfthe seal 'flaps of seal flap gummer. connectedtosaidradiallyir fixed axis of rotation, a radiallyadjustable movablearms at the'outerends thereof, r011-. ers on said gummer, and a guidingcam loosely fitting onsaid shaft and adapted to suitably guide saidrollers on said, gummer, thereby bringing saidgummer into contact; with,the seal, flaps of said blanks on said carrier, combined with amechanismadapted to automatically turn ,said guiding-cam on said shaftinto a., position whereby it will;

guide said rollers" to bring sai'dgummer out ofcontact with said carrierin the absence of a blank thereon; y p 15. In a machine formaking windowenvelops, a mechanism for gumming'theseal" flaps of the envelop blanks,comprising a carrier for said blanks, a shaft having a rotary'gummerconnected thereto, rollers on said gummer, a guiding cam loosely fittingon said shaft and adapted to control the motion ofsaid gummer by meansof said rollers 1- Cam-0n saidshaft, and a mechanism for automaticallycontrolling the position of said guiding cam on saidshaft, saidmechanism comprismg" a rotary d sengagement cam, a roller .operatlvelyconnected to sa1d gulding cam, said roller being normally-out of contactwith said disengagement cam and adapted tobe brought into Contacttherewith, and automatic means for bringing said roller the absence ofablank on said carrier, theremechanism for gumming the seal fiaps ofpart1y mad 'envelops, a seal flap folding mechanism and a means fortransmitting said partly made jenvelops from said gumming mechanism tosaid; folding mechanism,

' said seal flap folding mechanism comprisnga rotary carrler for saidpartly made en by changing theposition'of said guiding 1 l cam on'saidshaft. i

velops, algrippe'r folder mountedon said carrierfjsaid gripper folderbeing adapted Ltoseiz'e the partly made envelop and fold the a sealflap; thereof against "said carrier, without closing said flap, and saidtransmitting means including stationary support for said partlymadeienvelops, to rest edgewise thereon, said'support beingzarrange'dadjacent to [said folding mechanism, and a memher adapted-to"cooperate;with said support to bring the partly fmade envelop within reach of saidseal flap folding mechanism. 7

'17, In a machinefor making envelope, a

on said carrier, a movable, plate operatively amma adjacent to saidcarrier and adapted to bring said envelop with the open seal flap Withinreach ofsaidgripper folder,ion the outside a of 3 said carrier, during I7 a proper phase ofthe'motionof said gripper folder,

and to cooperate therewith in foldingsaid seal flap, said gripper folderbeing adapted said foldedenvejlop on said plate.

seal flap folding mechanism, means for actu- 11o to fold said seal flapover the edge of said plate without closing the seal flap, and saidcarrier, in its rotation, being adapted to a move said gripperfolden'th'ereby carrying In a machine for making envelo ps, a

ating said mechanism, a support arranged adjacent to saidfoldingmechanism for the partly made envelop to rest edgewis'e thereon, asuitable member for said partly made envelop s to lean againstflatwise,and a plate adapted tocooperate with said support and said member tobring the upper'part of said partly made envelop" within reach of saidseal flap folding mechanism. a

19. In a-machine for making envelops, a

back flap gumming mechanism, a back flap r I folding mechanism and aseal flap gumming mechanism, combined with a cylindrical pressing platefor the back' flaps of'the en-. velop blanks, said folding mechanismincluding a rotary carrier for the blanks,"and, a gripper folder mountedon saidcarrier, said gripper folder being adapted tofold said backflaps, .and said pressing plate being adapted to cooperate with saidcarrier in pressing said back flaps therebetween.

20. In a machine for making envelops, a

back flap gumming mechanism, a back flap folding mechanism and a sealflap gumming mechanism, combined with a cyl ndrical pressing plate forthe back flaps of the envelop blanks, said folding mechanlsm ncludlng arotary carrier and a gripper folder mounted on said rotary carrier, saidgripper folder being adapted to fold said back flaps, and said pressingplate being connected to said seal. fiapgumming mechanism and adapted torotat-etherewith' andto cooperate with said c'arrier'in pressing saidback flaps therebetween.

. 21. In a machine for making envelops,.the

combination with means for folding the flaps of an envelop blank, ofmeans'for supporting said blank during the folding operations, a portionof said supporting means being movable to eiiect the creasing of one. ofthe flaps of the blank, and means for engaging the .rear edge of theblank on said support to register the same in ,operation of said movableportion.

22. In a machine for making envelops, the combination with means forfolding the flaps of an envelop blank, of means for support- 7 ing saidblank during the-folding operations,

a portion of said supporting means being .inovable to effect thecreasing of one of the flaps of the blank, an actuating means for saidmovable portion, and registeringdevices for the. blank, yieldinglyconnected to said actuating means, whereby the initial movement ofsaidactuating means registers said blank.

23. In a machine for making envelops, the.

combination with means for folding the flaps of an envelop blank, ofmeans for supporting said blank during the folding operations,

a portion of said-supporting means being,

movable to efi'ect'the creasing of one of-the advance of the creasingflaps of the blank, an actuating means for said movable portion, andmeans for arresting' the movement of said registering devices,substantially coincident with the op- 'eration ofsaid movable portion bysaid actuating means.

24. In a machine for making window envelops, a support for envelopblanks, a movable suction member adapted to apply patches of transparentpaper to successive blanks on said support, and a stripping plate forsaid patches adapted to strip said patches off said suction member andto de-' posit said patches upon said blanks on said the same toward saidblanks on said support, said stripping plate being adapted to strip saidpatches off said suction member and deposit said patches upon saidblanks on said blank support, said patch support and said strippingplate being adapted to be turned out of the path of said suction memberduring its travel toward said blank support, and said stripping platehaving suitable openings adapted to clear said patch support when turnedout of the path of said suction member. 1 r

26. In a machine for making envelops, a cylindrical member rotatingabout a fixed axis and adapted to carry a blank on the surface thereof,a second member rotating about a fixed axis and providing asurface forcooperation with a flap of a blank on said first member to gum saidflap," and means for automatically retracting the surface of one of saidmembers, in the absence of a blank on said first rotating member.

gated this twenty-first day of August, f191 i SAMUEL FURMAN. IVitnessesNELLIE VVHALEN, Gno. H. KENNEDY, Jr.

